how to turn on macbook air with touch id

If you share your MacBook and don't have different user accounts for each person, you could use this trick to register fingerprints from different people on one account. Doubled, that means up to six for your account and up to four for another user. Your Mac can save up to five fingerprints across all user accounts, but only up to three per account. It only takes up one of your scan slots, so doing the same for the other two slots means you can have a maximum of six fingerprints saved for Touch ID on one user account. The result? When the scan is finished, you now have the ability to unlock your Mac with either of the fingers you made the scan with. Essentially, macOS is scanning your two fingerprints as one, and all scans are encrypted and stored offline in the MacBook's Secure Enclave. You would think that switching between fingers during a scan would trigger an error message in macOS that makes you start over, but you can change fingers during the scanning process without any issues. While this method helps ensure that most unlock attempts are successful, you could easily take advantage of those multiple scans to double up fingerprints.

When setting up a fingerprint with Touch ID for the first time, your MacBook Pro or MacBook Air takes multiple scans of each fingerprint to ensure that macOS has a complete picture of your unique print.

More Info: How to Use All 10 Fingerprints for Touch ID on Your iPhone - Not Just 5 of Them.

Instead, this trick relies on the same method that lets you register all ten of your fingerprints on iPhone, not just five, and it couldn't be simpler to enact on MacBooks with Touch ID. There are no utilities to download, no Terminal commands to mess with, and it doesn't take a macOS power user to squeeze more functionality out of Apple's rigid fingerprint scanner.

If that seems unfair, there's an easy trick to doubling that number, meaning six of your fingerprints could unlock your laptop! An iPhone with Touch ID can register up to five fingerprints, but Macs can only register a maximum of three per account. While Touch ID has been a part of the iPhone's legacy since 2013, Apple waited until 2016 to add biometrics to its MacBook lineup, and it's not as impressive.

How to turn on macbook air with touch id